Season one: Finished!
Season two: Started!
I wish I could read more without spoiling myself. Wiki has a page about the different music/themes for various characters, I'd love to do more than skim it but I can't!
It's almost surprising that a show as good as this could be on TV, when the majority of shows are things like 'Who Wants to Marry a Millionaire?' and 'The Bachelor' and crap like that.